WO2004098821A1 - Fraise a lame rapportee permettant de tourner - Google Patents

Fraise a lame rapportee permettant de tourner Download PDF

Info

Publication number
WO2004098821A1
WO2004098821A1 PCT/SE2004/000679 SE2004000679W WO2004098821A1 WO 2004098821 A1 WO2004098821 A1 WO 2004098821A1 SE 2004000679 W SE2004000679 W SE 2004000679W WO 2004098821 A1 WO2004098821 A1 WO 2004098821A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting
insert according
beveled edge
corner area
turning insert
Prior art date
Application number
PCT/SE2004/000679
Other languages
English (en)
Inventor
Ronnie Löf
Chris Mills
Hans Thordenberg
Jörgen Wiman
Original Assignee
Sandvik Intellectual Property Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20291223&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2004098821(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sandvik Intellectual Property Ab filed Critical Sandvik Intellectual Property Ab
Priority to NZ543240A priority Critical patent/NZ543240A/en
Priority to JP2006508042A priority patent/JP4616250B2/ja
Priority to CNB2004800124634A priority patent/CN100531976C/zh
Priority to AU2004236140A priority patent/AU2004236140B8/en
Priority to KR1020057021020A priority patent/KR100760495B1/ko
Priority to BRPI0410007-7A priority patent/BRPI0410007B1/pt
Publication of WO2004098821A1 publication Critical patent/WO2004098821A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
    • B23B27/16—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
    • B23B27/141—Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/20—Top or side views of the cutting edge
    • B23B2200/201—Details of the nose radius and immediately surrounding area
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/23—Cutters, for shaping including tool having plural alternatively usable cutting edges
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/24—Cutters, for shaping with chip breaker, guide or deflector

Definitions

  • the present invention relates to a cutting insert for turning, the cutting insert comprising at least one cutting geometry surface having at least one corner area, wherein a nose angle of the corner area is in the interval of 30° ⁇ ⁇ ⁇ 85°.
  • the material in the cutting insert may comprise different hard materials that cutting inserts for chip removing machining normally are manufactured from, such as for example cemented carbide, ceramics, cubic boron nitride and diamond.
  • So-called abrasive jet wear of the major cutting edge on cutting inserts used for turning operations is a problem that prior art has sought to solve in a number of different ways. Generally, at a smaller setting angle, a smaller degree of abrasive jet wear is obtained.
  • square cutting inserts are used, the setting angle being determined at 45°.
  • round cutting inserts are used, the cutting depth in such a case normally being limited to approx. 25 % of the diameter of the cutting insert.
  • cutting inserts having a relatively large corner radius are used, the cutting depth in such a case being limited to approx. 30 % of the corner radius. This is suitable in finishing operations but for roughing operations, a larger cutting depth is generally required.
  • a primary object of the present invention is to provide a turning insert which in chip removing machining exhibits a reduced abrasive jet wear of the cutting corner, in comparison with known cutting inserts.
  • At least the primary object of the present invention is realised by means of a cutting insert for turning operations, the turning insert comprising at least one cutting surface which has at least one corner area.
  • the corner area defines a nose angle in the range of 30-85°.
  • the corner area includes a beveled edge, wherein a bisector of the nose angle intersects a midpoint of the beveled edge at a right angle.
  • FIG. 1 shows a perspective view of an embodiment of a cutting insert according to the present invention
  • Fig. 2 shows a schematic planar view of a corner of the cutting insert according to Fig. 1 ;
  • Fig. 3 shows a comparison between an active corner of a cutting insert according to the present invention and an active corner of a cutting insert according to prior art
  • Fig. 4 shows an alternative embodiment of a cutting insert according to the present invention
  • Fig. 5 shows a schematic planar view of a corner of the cutting insert according to Fig. 4;
  • Fig. 6 shows a schematic planar view of a corner of yet an alternative embodiment of a cutting insert according to the present invention
  • Fig. 7 shows a schematic planar view of a corner of additional alternative embodiments of a cutting insert according to the present invention
  • Fig. 8 shows a view similar to Fig. 7 of another alternative embodiment of a cutting insert according to the present invention.
  • the cutting insert according to the present invention Fig. 1 is generally negative.
  • the cutting insert according to Fig. 1 comprises two cutting surfaces 1 , i.e., the top and bottom surfaces of the insert, which are parallel to each other and located at a certain distance from each other. In Fig. 1 , only one of the cutting surfaces 1 is seen.
  • the cutting surfaces 1 are inter- connected by means of four side surfaces 3, which, since the cutting insert is negative, generally have an extension perpendicular to the cutting geometry surfaces 1. Only two side surfaces 3 are visible in Fig. 1.
  • the cutting insert shown in Fig. 1 has a center hole 5, which is intended to receive a screw or the like in order to anchor the cutting insert in a cutting seat of a holder (not shown).
  • each corner area 7 comprises, in the embodiment illustrated, a rectilinear edge bevel 9, or beveled edge, which normally constitutes a major cutting edge in use of the cutting insert according to Fig. 1.
  • Adjacent to the edge bevel 9, the cutting insert according to Fig. 1 has a clearance surface 10, which generally has an extension between the two identical edge bevels 9.
  • Each side surface 3 includes two longitudinal side edges 12, which are mutually parallel and connect at one end thereof to an adjacent edge bevel 9. In the embodiment shown in Fig. 1 , said connection takes place via so-called wiper technology, i.e. there are provided radiused wiper edge segments 13 and
  • the side edges 12 constitute main cutting edges in this embodiment.
  • the portions 15 located inside the edges 12 have in principle the same design as the chip breaker 11. However, said portions 15 do normally not exert any chip breaking function.
  • a schematic planar view is shown of a corner area 7 of the cutting insert according to Fig. 1.
  • the nose angle a of the corner area 7 i.e. the angle between the edges
  • the bisector B intersects the edge bevel 9 in the center thereof, i.e. the parts of the edge bevel 9 located on both sides of the bisector B are equally long.
  • the bisector B intersects the edge bevel 9 at a right angle, which in Fig. 2 is defined by the fact that the angle ⁇ , between the bisector B and an extension of the edge bevel 9, has a value of 90°.
  • the length of the edge bevel 9 has been designated by L.
  • FIG. 2 also an imaginary inscribed circle iC is drawn by means of a dashed circular line, the inscribed circle being tangent to the two main cutting edges 12 disposed on opposite sides of the corner region.
  • the center C of the inscribed circle iC coincides with the centre for the center hole 5 in Fig. 1., and is disposed midway between the opposite corner areas 7, and thus touches all four of the side edges 14.
  • a comparison is illustrated in turning by means of the cutting insert according to Fig. 1 and a conventional cutting insert having a corner radius R.
  • the cutting depth a p in question is equal for the two cutting inserts, which as has been pointed out by way of introduction means that the cutting depth a p is approx. 0.3 x R if a setting angle K r ⁇ of 45° is to be obtained for the conventional cutting insert.
  • the corresponding cutting depth a p is obtained for the cutting insert according to Fig. 1 , the setting angle K r2 also in this case being 45°.
  • the cutting insert for turning according to the present invention leaves substantially less material in the fillet than a conventional cutting insert.
  • the cutting insert according to Fig. 1 can be used for turning in two directions perpendicular to each other without the location of the cutting insert in the holder having to be changed.
  • FIG. 4 an alternative embodiment is shown of a cutting insert for turning according to the present invention.
  • the cutting insert shown in Fig. 4 is intended for copying and has generally a positive geometry.
  • the cutting insert according to Fig. 4 has a top cutting surface 101 as well as a bottom support surface (not visible), the cutting surface 101 and the support surface being parallel to each other and located at a certain distance from each other.
  • the cutting surface 101 and the support surface are inter-connected by means of four side surfaces 103. Since the cutting insert is positive, the side surfaces 103 connect to the cutting geometry surface 101 under an acute angle while the side surfaces 103 connect to the support surface under an obtuse angle. Only two side surfaces 103 are visible in Fig. 4. Furthermore, the cutting insert shown in Fig. 4 has a center hole
  • each corner area 107 comprises a rectilinear edge bevel 109 in the embodiment illustrated, which normally constitutes major cutting edge in use of the cutting insert according to Fig. 4. Adjacent to the edge bevel 109, the cutting insert according to Fig. 1 has a clearance surface 110. Inside each rectilinear edge bevel 109, a chip breaker 111 is arranged, which is not described more in detail since it can have different designs within the scope of the present invention.
  • Each side surface 103 includes two longitudinal side edges 112, which are mutually parallel and connect at one end thereof to an adjacent edge bevel 109.
  • said connection takes place via so-called wiper technology, correspondingly as has been described above in connection with Fig. 1.
  • a schematic planar view is shown of a corner area 107 of the cutting insert according to Fig. 4.
  • the nose angle a of the corner area 107 i.e. the angle between the edges 112
  • ⁇ 35°.
  • the bisector B intersects the edge bevel 109 in the centre thereof, i.e. the parts of the edge bevel 109 located on both sides of the bisector B are equally long.
  • the bisector B intersects the edge bevel 109 at a right angle, which in Fig. 5 is defined by the fact that the angle ⁇ , between the bisector B and an extension of the edge bevel 109, has a value of 90°.
  • the length of the edge bevel 109 has been designated by L.
  • a schematic planar view is shown of a corner area 207 of an additional alternative embodiment of a cutting insert for turning according to the present invention, the cutting insert having a corresponding basic shape as the cutting insert according to Fig. 1.
  • What principally separates the corner area 207 according to Fig. 6 from the corner area 7 according to Fig. 2 is the design of the edge bevel 209, which in Fig. 6 is not rectilinear. More precisely, the edge bevel 209 comprises two rectilinear portions 209a and an arched
  • a bisector B of the nose angle ⁇ intersects the edge bevel 209 in the center thereof and at a right angle.
  • the length L of the edge bevel 209 is defined as the rectilinear distance between the end points of the non-linear edge bevel 209.
  • a schematic planar view is shown of a corner area 307 of additional alternative embodiments of a cutting insert for turning according to the present invention, wherein, within the scope of the present invention, the edge bevel either may be convexly curved 309a (Fig.
  • edge bevels 309a, 309b concavely curved 309b (Fig. 8).
  • the distance between the reference line RL and the point of the respective edge bevel 309a, 309b located farthest away from the reference line RL has in Fig. 7 and Fig. 8 been designated by 5.
  • the length L of the edge bevel 309a; 309b is defined as the rectilinear distance between the end points of the curved edge bevel 309a or 309b.
  • the maximum value for ⁇ /L 0.15.
  • the bisector B intersects the edge bevel 309a, 309b in the center thereof, i.e. the parts of the edge bevel 309a, 309b located on both sides of the bisector B are equally long.
  • the bisector B intersects the edge bevel 309a, 309b at a right angle, which is marked in Figs. 7 and 8.
  • the above-described embodiments of cutting inserts for turning are preferably intended for machining high-temperature materials. However, the principles of the present invention may also be applied to cutting inserts for hard turning, in such a case the edge bevel obtaining a relatively seen substantially smaller length.
  • the following relation between the length L of the edge bevel 9; 109; 209 and the diameter D of the inscribed circle iC applies: 0.01 ⁇ L/D ⁇ 0.45.
  • the more specified relation 0.1 ⁇ L/D ⁇ 0.45 applies.
  • the more specified relation 0.01 ⁇ L/D ⁇ 0.1 applies.
  • the above-described embodiments of cutting inserts for turning according to the present invention have center holes 5; 105 for clamping the respective cutting insert in a holder.
  • the cutting inserts according to the present invention may lack centre holes, the same in such a case being clamped by means of, for instance, a clamp.
  • the imaginary inscribed circle iC of Figs. 5 and 6 would have its center lying on the bisector B at a location midway between opposite nose areas that are bisected by the bisector B in the embodiments depicted in Figs. 1-7.
  • the imaginary circle iC would be located so as to touch all three main cutting edges.
  • the two above-described cutting inserts for turning are generally negative.
  • the concept of the present invention is not limited to negative cutting inserts but may also be applied to positive cutting inserts.
  • the two above-described embodiments of cutting inserts for turning according to the present invention have generally a rhombic shape in planar view.
  • the cutting inserts have a generally triangular shape in planar view.
  • cutting inserts for hard turning may be formed in accordance with the present invention. These cutting inserts need, however, in principle not be provided with any especially formed chip breaker, but the planar surface lying inside the cutting edge constitutes in this case chip breaker.

Abstract

La présente invention concerne une fraise à lame rapportée tournante qui comprend au moins une surface coupante possédant au moins une zone de coin. Cette zone de coin définit un angle de pointe compris entre 300 et 850. Cette zone de coin comprend un bord biseauté. Une bissectrice de cet angle de pointe coupe le bord biseauté au centre de celui-ci à angle droit.
PCT/SE2004/000679 2003-05-08 2004-05-04 Fraise a lame rapportee permettant de tourner WO2004098821A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NZ543240A NZ543240A (en) 2003-05-08 2004-05-04 Cutting insert for turning
JP2006508042A JP4616250B2 (ja) 2003-05-08 2004-05-04 旋削用切削インサート
CNB2004800124634A CN100531976C (zh) 2003-05-08 2004-05-04 用于车削的切削刀片
AU2004236140A AU2004236140B8 (en) 2003-05-08 2004-05-04 Turning insert
KR1020057021020A KR100760495B1 (ko) 2003-05-08 2004-05-04 선삭용 절삭 인서트
BRPI0410007-7A BRPI0410007B1 (pt) 2003-05-08 2004-05-04 Inserto de corte para torneamento

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0301323-2 2003-05-08
SE0301323A SE527378C2 (sv) 2003-05-08 2003-05-08 Skär för svarvning försett med en eggfas

Publications (1)

Publication Number Publication Date
WO2004098821A1 true WO2004098821A1 (fr) 2004-11-18

Family

ID=20291223

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2004/000679 WO2004098821A1 (fr) 2003-05-08 2004-05-04 Fraise a lame rapportee permettant de tourner

Country Status (13)

Country Link
US (1) US7544023B2 (fr)
EP (1) EP1475171B2 (fr)
JP (1) JP4616250B2 (fr)
KR (1) KR100760495B1 (fr)
CN (1) CN100531976C (fr)
AT (1) ATE410253T1 (fr)
AU (1) AU2004236140B8 (fr)
BR (1) BRPI0410007B1 (fr)
DE (1) DE602004016911D1 (fr)
NZ (1) NZ543240A (fr)
SE (1) SE527378C2 (fr)
WO (1) WO2004098821A1 (fr)
ZA (1) ZA200508691B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9149878B2 (en) 2008-06-26 2015-10-06 Seco Tools Ab Family of cutting inserts, milling cutting tool, and cutting insert

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Publication number Priority date Publication date Assignee Title
SE528016C2 (sv) 2004-05-14 2006-08-08 Sandvik Intellectual Property Svarvskär med en skarp övergång mellan en första och en andra egg
IL169340A (en) 2005-06-22 2010-04-29 Gil Hecht Cutting insert
KR100817259B1 (ko) * 2007-01-29 2008-03-27 한국야금 주식회사 절삭 인서트
EP2155425A1 (fr) * 2007-05-24 2010-02-24 CeramTec AG Plaquette de coupe à facette double paroi stabilisatrice
JP5820371B2 (ja) * 2009-05-26 2015-11-24 ゲーコーエヌ エアロスペース スウェーデン アーベー 切削工具のためのホルダ、切削工具、および切削インサート
WO2010147157A1 (fr) 2009-06-16 2010-12-23 株式会社タンガロイ Insert de coupe et fraise à surfacer
WO2012043822A1 (fr) * 2010-09-30 2012-04-05 株式会社タンガロイ Outil de coupe à tranchants échangeables
KR101838238B1 (ko) 2011-01-27 2018-03-13 대구텍 유한회사 접선방향 절삭 인서트
EP2484467B1 (fr) * 2011-02-03 2014-05-07 Seco Tools AB Plaquette de coupe avec arêtes de coupe symétriques et arrondies
SE535540C2 (sv) 2011-02-11 2012-09-18 Sandvik Intellectual Property Fräsverktyg för kuggfräsning
SE535541C2 (sv) 2011-02-11 2012-09-18 Sandvik Intellectual Property Skärinsats för ett fräsverktyg som är utformat för kuggfräsning
JP5696782B2 (ja) * 2011-04-26 2015-04-08 株式会社タンガロイ 切削インサートおよび刃先交換式回転切削工具
JP5774910B2 (ja) * 2011-05-31 2015-09-09 日本特殊陶業株式会社 後挽き加工用のスローアウェイチップ、後挽き加工用のバイト
JP5401732B1 (ja) * 2012-10-23 2014-01-29 住友電工ハードメタル株式会社 フライス加工用刃先交換式切削インサート
CN103223501A (zh) * 2013-04-01 2013-07-31 无锡富盛阀业有限公司 一种刃磨菱形刀片
JP6639051B2 (ja) * 2015-02-24 2020-02-05 株式会社タンガロイ 切削工具
EP3153261B1 (fr) * 2015-10-09 2018-04-04 Sandvik Intellectual Property AB Insert de tournage et procede
KR101980090B1 (ko) 2017-12-29 2019-05-20 한국야금 주식회사 절삭 인서트 및 이를 장착한 절삭공구
EP3848136A1 (fr) 2020-01-10 2021-07-14 Palbit S.A. Insert tournant à double face

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JPH11309608A (ja) * 1998-04-28 1999-11-09 Mitsubishi Materials Corp スローアウェイチップ及び穴明け工具
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9149878B2 (en) 2008-06-26 2015-10-06 Seco Tools Ab Family of cutting inserts, milling cutting tool, and cutting insert

Also Published As

Publication number Publication date
SE0301323L (sv) 2004-11-09
CN1784282A (zh) 2006-06-07
ZA200508691B (en) 2007-07-25
SE0301323D0 (sv) 2003-05-08
ATE410253T1 (de) 2008-10-15
AU2004236140A1 (en) 2004-11-18
NZ543240A (en) 2008-04-30
EP1475171A2 (fr) 2004-11-10
US20050249559A1 (en) 2005-11-10
BRPI0410007A (pt) 2006-04-25
AU2004236140B8 (en) 2010-01-21
AU2004236140B2 (en) 2009-05-28
BRPI0410007B1 (pt) 2018-07-03
SE527378C2 (sv) 2006-02-21
KR100760495B1 (ko) 2007-09-20
EP1475171B2 (fr) 2014-10-15
EP1475171B1 (fr) 2008-10-08
CN100531976C (zh) 2009-08-26
EP1475171A3 (fr) 2006-08-23
US7544023B2 (en) 2009-06-09
KR20050123179A (ko) 2005-12-29
JP2006525131A (ja) 2006-11-09
JP4616250B2 (ja) 2011-01-19
DE602004016911D1 (de) 2008-11-20

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